CN107418910A - A kind of biological agent for preventing and treating crop in cruciferae clubroot and its application - Google Patents

A kind of biological agent for preventing and treating crop in cruciferae clubroot and its application Download PDF

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CN107418910A
CN107418910A CN201710312344.XA CN201710312344A CN107418910A CN 107418910 A CN107418910 A CN 107418910A CN 201710312344 A CN201710312344 A CN 201710312344A CN 107418910 A CN107418910 A CN 107418910A
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bacillus amyloliquefaciens
cruciferae
crop
biological agent
clubroot
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伊日布斯
李勤超
祁腾飞
严金平
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Kunming University of Science and Technology
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Abstract

The invention discloses a kind of biological agent for preventing and treating crop in cruciferae clubroot and its application, belong to microbe field.The production bacterial strain of biological agent is Bacillus amyloliquefaciens strainBacillus amyloliquefaciens KM 68, has been deposited in China typical culture collection center, and deposit number is CCTCC NO:M 2017228.The inventive method is that the heat treatment of the soil sun combines Bacillus amyloliquefaciens strainBacillus amyloliquefaciens KM 68 bacterium solution root irrigation method, this method can effectively preventing crop in cruciferae clubroot, be advantageous to crop in cruciferae volume increase, and the prevention and controls are simple to operate, and expense is low, and biological agent is easy to plant produced.

Description

A kind of biological agent for preventing and treating crop in cruciferae clubroot and its application
Technical field
The present invention relates to a kind of biological agent for preventing and treating crop in cruciferae clubroot and its application, belong to microbe Field.
Background technology
Crop in cruciferae vegetables clubroot is by Brassica genus plasmodiophora brassicae(PLasmodiophora brassicae Woron)A kind of worldwide soil-borne disease caused by dip-dye.There is generation current most of countries and regions.Due to the pathogen Infectiousness is strong, and spread speed is fast, and preventing and treating is difficult, and in recent years, crop in cruciferae clubroot is climing rapidly in China's most area Prolong, serious threat the production of Cruciferae crops.
At present, preventing and treating the method for crop in cruciferae clubroot mainly includes:Chemical control, breeding for disease resistance, biological control. Because Brassica genus plasmodiophora brassicae belongs to obligate parasite, breeding for disease resistance is that preventing and treating crop in cruciferae clubroot is maximally effective in theory Mode, however, Brassica genus plasmodiophora brassicae biological strain is numerous, variation is fast, it is difficult to cultivate permanently effective disease-resistant variety, currentization It is still to prevent and treat the main path of crop in cruciferae clubroot to learn chemical control, but chemical control is not only wasted time and energy, and long Phase uses chemical pesticide, certainly will cause a large amount of accumulation of chemical pesticide residual in soil, and chemical pesticide residual once enters agricultural product In, it will directly endanger people health.There is the preventing and treating that biocontrol microorganisms are applied to crop in cruciferae clubroot by researcher in recent years In, and it is found that some bacterium, such as fungies, bacillus amyloliquefaciens for having good result to prevent and treat to clubroot, bacillus subtilis Bacterium, streptomycete, Trichoderma, Acremonium endogenetic fungus etc..But biocontrol microorganisms preventing and treating clubroot is used alone, often prevention effect is not It is good, it is impossible to improve the yield of crops, and long-term use biocontrol microorganisms, the microbial diversity in soil certainly will be caused to change Become, edaphon is exerted an adverse impact.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides it is a kind of prevent and treat crop in cruciferae clubroot biological agent, Can efficient, nontoxic, safety, noresidue, it is environment amenable preventing and treating Cruciferae clubroot.
The microbial strains that the present invention uses is bacillus amyloliquefaciensBacillus amyloliquefaciens KM 68 bacterial strains, the bacterial strain are deposited in China typical culture collection center, preservation address on May 2nd, 2017:Wuhan, China, Wuhan University, deposit number are CCTCC NO: M 2017228.
The bacillus amyloliquefaciens of the present inventionBacillus amyloliquefaciens The bacterial strains of KM 68, from Yunnan Province elder brother Obtained in the soil of Ming Shi Songming Counties using dilution-plate method and plate streak separation, it is automatic through morphology, cultural colony and DNA Identification systems determine, and the bacterial strain is a new strains of bacillus amyloliquefaciensBacillus amyloliquefaciens KM 68。
The present invention is another object is that by bacillus amyloliquefaciensBacillus amyloliquefaciensThe bacterial strains of KM 68 Biological agent is made to apply in crop in cruciferae clubroot is prevented and treated.
The application process of the biological agent of described preventing and treating crop in cruciferae clubroot, is comprised the following steps that:
(1)The soil sun is heat-treated:Deep ploughing soil, pour water, seal, then carry out the sun and be heat-treated more than 30 days;
(2)Greenhouse production:Acquisition step(1)The pedotheque of gained sun heat treatment is placed in the hole tray in greenhouse, in hole tray The vegetable seeds of middle sowing crop in cruciferae, the pedotheque covering for taking the sun to be heat-treated, watering, the plant of crop in cruciferae Thing seed sprouting cuts off unnecessary seedling to when growing 3 ~ 4 leaves, and one plant of healthy seedling is retained per cave, is made using biology Agent carries out root irrigation 1 time to crop in cruciferae plant seedlings;
The biological agent is bacillus amyloliquefaciensBacillus amyloliquefaciens The bacterium solution of the bacterial strains of KM 68, bacterium The gemma amount of liquid is 4 × 105~ 1×107cfu/mL;
The biological agent of preventing and treating crop in cruciferae clubroot provided by the invention has the following advantages that:
(1)The present invention uses soil sun heat treating process combination bacillus amyloliquefaciensBacillus amyloliquefaciens KM 68 biological agent facture, crop in cruciferae clubroot not only can be effectively prevented and treated, and the production of crop can be significantly improved Amount;
(2)Present invention application concentration of bacterium solution in biological agent processing procedure is low, and bacterium solution application dosage is few, and only needs pouring root Once;Simple to operate, expense is low, can have necessarily to the soil environment of deterioration to environment non-hazardous, and by sun heat treatment Repair.
Brief description of the drawings
Fig. 1 is bacillus amyloliquefaciens strain of the present inventionBacillus amyloliquefaciensKM 68 bacterium colony figure;
Fig. 2 is bacillus amyloliquefaciens strain of the present inventionBacillus amyloliquefaciensKM 68 electron microscope is swept Trace designs piece;
Fig. 3 is bacillus amyloliquefaciens strain of the present inventionBacillus amyloliquefaciensKM 68 growth curve.
Embodiment
Below in conjunction with drawings and examples to the further detailed description of the present invention, but protection scope of the present invention is not It is only limitted to the content.
Bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68 is from Yunnan Province Songming County soil It is middle to be obtained using dilution-plate method and plate streak separation screening, Chinese Typical Representative culture guarantor is stored on May 2nd, 2017 Tibetan center, deposit number are CCTCC NO: M 2017228.
Embodiment 1:Bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68 screening separation
LB culture medium prescriptions:The g/L of tryptone 10, the g/L of yeast extract 5, the g/L of sodium chloride 5, the g/L of agarose 15;PH values For 7.4 ± 0.1;Add distilled water stirring and dissolving after weighing, be distributed into triangular flask, in 121 DEG C of autoclave sterilizations, be down flat plate;
The pedotheque of 1 g Yunnan Province Songming County collection is weighed, is put into the triangular flask with bead for filling 50 mL sterilized waters In, concussion shake up 30 min, 1 mL supernatants are then drawn from triangular flask using liquid-transfering gun, add another mL of Zhi Shengyou 9 without In the test tube of bacterium water, mixing, according to said method, diluted concentration is respectively prepared as the 10 of original solution concentration-3、10-4、10-5Soil again Solution, take 100 uL dilute the soil liquid be coated on LB culture medium flat plates, each dilution factor is repeated 3 times, 37 DEG C, 150 The h of shaking table culture 10 under the conditions of r/min, picking single bacterium are fallen within and rule on LB culture mediums, and colony growth situation is observed in timing, then Using plate streak, bacterial strain is purified, makes inclined-plane label respectively, is stored in the refrigerator that temperature is 4 DEG C.Pass through molecular system Auxology is analyzed, and is named as bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68, deliver to " Chinese allusion quotation Type culture collection " (abbreviation CCTCC) preserves.
Embodiment 2:Bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68 morphology
Bacillus amyloliquefaciens strain is prepared using gradient dilution methodBacillus amyloliquefaciensKM 68 bacterium is hanged Liquid, the bacteria suspension for drawing 10 uL difference dilution factors respectively is coated on LB culture medium flat plates and cultivated, to growing after 8 ~ 15 h Single bacterium colony size, shape, surface, edge, the characteristic such as color and transparency observed;
Cultivate the bacillus amyloliquefaciens strain of different dilution factors respectively on LB culture mediumsBacillus amyloliquefaciensKM 68, after cultivating 8 ~ 15 hours, 10uL bacteria suspensions is drawn respectively and carry out film-making, in optical microphotograph Microscopic observation bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68 growing state and morphological feature;
There is following feature by cultivating and observing thalline:Bacterium colony is rounded or oval, has fold, slightly swells, opaque, is in White, Gram's staining are positive, and are in rod-short under microscope(Bacterium colony figure is shown in Fig. 1, and electron microscope scanning picture is shown in figure 2).
Embodiment 3:Bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68 16s rDNA bases Because of Sequence Identification
Single bacterium colony is inoculated in LB medium cultures after 24 h, takes 1 uL to carry out bacterium colony PCR checkings.For bacterium solution PCR's Primer is as follows:Forward primer 27F: 5,-AGAGTTTGATCMTGGCTCAG-3,;Reverse primer 1492R: 5,- GGTTACCTTGTTACGACTT-3,.PCR reaction systems:The uL of 10xTaq Buffer 2.5, the uL of forward primer 0.5, reversely draw The uL of thing 0.5, bacterium solution 1 uL, dNTP(10 mmol/L )The U of 0.5 uL, Taq DNA polymerase 0.5, add water to 25 UL, PCR amplification condition:According to 94 DEG C, 30 s, 57 DEG C, 120 s, 72 DEG C, 90 s program progress after 94 DEG C of min of pre-degeneration 3 35 circulations, last 72 DEG C re-extend 10 min.Electrophoresis uses agarose gel electrophoresis, nucleic acid dye EB, DNA Mark length Spend for 2000, the PCR products purified finally are delivered into Yunnan Shuo Qing bio tech ltd is sequenced, by acquisition Strain KM 68 16S rDNA sequences are contrasted with existing correlated series in NCBI nucleic acid databases.As a result show The strain KM 68 of acquisition withBacillus amyloliquefaciensStrain DM-54,Bacillus amyloliquefaciensStrain Lx-11,Bacillus amyloliquefaciensStrain LD5,Bacillus amyloliquefaciensStrain EB19 similarities reach 99%(It is shown in Table 1), it may be determined that strain KM 68 belong to A kind of new strains of bacillus, are named as bacillus amyloliquefaciens strainBacillus amyloliquefaciens KM 68,
Embodiment 4:Bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68 culture growth
LB culture medium prescriptions are:The g of peptone 10, the g of sodium chloride 5, the g of yeast extract 10, the L of distilled water 1, pH value 7.4;
Use LB Liquid Culture based assays bacillus amyloliquefaciensBacillus amyloliquefaciens KM 68 grows song Line:The g of tryptone 1 is weighed, the g of yeast extract 0.5, the g of sodium chloride 0.5, agarose 1.5, is dissolved in water and is settled to 100 mL; Using 11mol/L sodium hydroxide solution by 7.0 ± 0.1, then by the LB culture mediums of configuration, it is distributed into 10 test tubes, Autoclave sterilization under the conditions of 121 DEG C, room temperature is then cooled to, in an aseptic environment, 10uL Xie Dian is accessed in each test tube AfnyloliquefaciensBacillus amyloliquefaciens The bacterium solutions of KM 68, under the conditions of 37 DEG C, 150 r/min, shaking table training Support 24 hours, the every 2 hours OD values for surveying a bacterium solution, with the time(Hour)For abscissa, using OD values as ordinate, solution starch is done BacillusBacillus amyloliquefaciens The growth curve charts of KM 68(See Fig. 3), the results showed that, solve starch gemma BacillusBacillus amyloliquefaciens KM 68 is most fast in 0-10 hours reproduction speed, and subsequent bacterium colony tends towards stability;
It is calculated in mass percent, liquid fermentation medium formula:Analysis for soybean powder 3%, corn flour 3%, sodium chloride 0.5%, calcium carbonate 0.5%, remaining is water;
By bacillus amyloliquefaciens strainBacillus amyloliquefaciensKM 68 spore is transplanted in LB culture mediums, 10 h are cultivated under the conditions of being 37 DEG C in temperature, obtain seed liquor, are 1 according to seed liquor and the volume ratio of water:100 ratio, will Seed liquor is inoculated into liquid fermentation medium, and 10 h are cultivated under the conditions of being 37 DEG C in cultivation temperature, after the completion of culture, fermentation Bacillus amyloliquefaciens bacterial concentration is reachable in liquid(1.6~3.2)×108cfu/mL;
Liquid fermentation preparation(Prevent and treat the biological agent of crop in cruciferae clubroot):Bacteria containing amount is determined through plate count, containing bacterium Amount reaches(1.6~3.2)×108 cfu/mL。
Embodiment 5:Liquid fermentation preparation(Prevent and treat the biological agent of crop in cruciferae clubroot)To crop in cruciferae (Pakchoi)The prevention effect experiment and volume increase experiment of clubroot
Experimental subjects:Pakchoi
Prepare biological agent:Experiment biological agent is prepared according to the culture growing method of embodiment 4, is contained through plate count measure Bacterium amount, the bacteria containing amount of bacillus amyloliquefaciens reach(1.6~3.2)×108cfu/mL;
By biological agent dilution, 20 times obtain preparation A, and by biological agent dilution, 100 times obtain preparation B, and biological agent is diluted 500 times obtain formulation C;
For medicine preparation and processing:
(1)The soil sun is heat-treated:Pour water the soil of deep ploughing 30min, makes the abundant saturation of the moisture in soil, covers one layer of modeling Material film is sealed, and is then carried out the sun and is heat-treated 30 days, collection sun heat treatment pedotheque;
(2)Greenhouse production:Hole tray is cultivated using 72 holes, by step(1)The cave that the pedotheque of sun heat treatment is placed in greenhouse In disk, 3 ~ 4 crop in cruciferae are sowed in every cave of hole tray(Pakchoi)Vegetable seeds, take step(1)Solar heat at Manage pedotheque covering, watering, crop in cruciferae plant(Pakchoi)For seed sprouting to 3 ~ 4 leaves are grown, it is unnecessary to cut off Seedling, per cave retain one plant of healthy seedling, using the dilution of biological agent to crop in cruciferae(Pakchoi)Seedling Carry out root irrigation 1 time, the dilution for the biological agent that each plant root adds is 10mL;
A:The dilution of biological agent is the preparation A of biological 20 times of preparation diluent;
B:The dilution of biological agent is the preparation B of biological 100 times of preparation diluent;
C:The dilution of biological agent is the formulation C of biological 500 times of preparation diluent;
D:Blank control, using clear water to crop in cruciferae plant(Pakchoi)Seedling carries out root irrigation 1 time, each plant The clear water amount that root adds is 10mL;
Test method:Experiment sets 4 processing altogether, 3 repetitions of each processing, Gong12Ge areas, is independent of each other between each area, during harvest It is each to distinguish survey production;
Investigation method:Investigation each handles totally 108 plants of seedling in 3 areas, treats that to 40 days, seedling is taken out for growth of seedling, surveys children The overground part fresh weight of seedling;
Clubroot is investigated using the size of root tumour as foundation, with reference to army of department(2009)Identify the morbidity of each plant clubroot Grade:
0 grade:Root is normal without tumour, root system development;
1 grade:Main root is not fallen ill or unobvious, diameter≤2 times basal part of stem;
2 grades:The obvious enlargement of main root.Diameter≤2-3 times of stem foot;
3 grades:The obvious enlargement of main root, diameter≤3- times of stem foot, no fibrous root;
The total strain number of the incidence of disease=disease plant/statistics
Disease index=∑(Diseased plant numbers at different levels × this plant of disease index)/ (investigating total strain tree × superlative degree value)
Relative control effect=(Compare disease index-processing disease index)× 100/ control disease index
Experimental result is as shown in table 1.
Comparative example 1:The only prevention and controls of soil sun heat treatment
Experimental subjects:Pakchoi
(1)The soil sun is heat-treated:Deep ploughing soil, pour water 30min, makes the abundant saturation of the moisture in soil, covers one layer of plastics Film is sealed, and is then carried out the sun and is heat-treated 30 days, the pedotheque of collection sun heat treatment;
(2)Greenhouse production:Hole tray is cultivated using 72 holes, by step(1)The cave that is placed in greenhouse of sun heat treatment pedotheque In disk, 3 ~ 4 crop in cruciferae plants are sowed in every cave of hole tray(Pakchoi)Seed, take step(1)Solar heat at Manage pedotheque covering, watering, crop in cruciferae plant(Pakchoi)For seed sprouting to 3 ~ 4 leaves are grown, it is unnecessary to cut off Seedling, per cave retain one plant of healthy seedling;
Test method:Field management produces with conventional;Experiment sets 1 processing, 3 repetitions, totally 3 areas, each distinguishes during harvest Open survey production;
Investigation method is same as Example 5;Experimental result is as shown in table 1.
Comparative example 2:Only with the prevention and controls of liquid fermentation preparation
Experimental subjects:Pakchoi
Using 72 holes culture hole tray, pedotheque is added in the hole tray in greenhouse, 3 ~ 4 cruciate flowers are sowed in every cave of hole tray Section's crop plants(Pakchoi)Seed, take pedotheque to cover, water, crop in cruciferae plant(Pakchoi)Seed sprouting is extremely 3 ~ 4 leaves are grown, cut off unnecessary seedling, one plant of healthy seedling is retained per cave;Using the dilution of biological agent to ten Zi Hua sections crop plants(Pakchoi)Seedling carries out root irrigation 1 time, the dilution for the biological agent that each plant root adds For 10mL;
E:The dilution of biological agent is the preparation A of biological 20 times of preparation diluent;
F:The dilution of biological agent is the preparation B of biological 100 times of preparation diluent;
G:The dilution of biological agent is the formulation C of biological 500 times of preparation diluent;
Test method:In addition to dispenser sets varying level, other field management produce with conventional;Test and set 3 processing, totally 9 Area, survey production is often distinguished during harvest;
Investigation method is same as Example 5;Experimental result is as shown in table 1;
Experimental result:
Prevention effect of the table 1. to pakchoi clubroot
As a result show:The yield of pakchoi seedling is individually significantly improved using sun heat treatment soil(P<0.05), but to root The prevention effect for the disease that swells is only 46.9%, and liquid fermentation preparation is used alone(Prevent and treat the biology system of crop in cruciferae clubroot Agent)Also the generation of clubroot can be suppressed, but liquid fermentation preparation is used alone(Prevent and treat the biology system of crop in cruciferae clubroot Agent)Chinese cabbage yield can not be increased(P>0.05), and the liquid fermentation preparation of various concentrations(Prevent and treat crop in cruciferae clubroot Biological agent)There is notable difference to the prevention effect of clubroot, when liquid fermentation preparation(Prevent and treat crop in cruciferae clubroot Biological agent)Middle bacillus amyloliquefaciensBacillus amyloliquefaciensKM 68 bacteria containing amount is respectively 4 × 105 cfu/mL、2×106 cfu/mL、107Cfu/mL, the prevention effect to clubroot is respectively 35.3%, 64.8%, 77.13%, the yield of sun heat treatment soil combination biocontrol microorganisms, not only obvious increase pakchoi(P<0.05), and in liquid fermentation Preparation(Prevent and treat the biological agent of crop in cruciferae clubroot)Bacillus amyloliquefaciensBacillus amyloliquefaciensAlso preventing and treating effect well can be reached when KM 68 bacteria containing amount is relatively low to the clubroot of pakchoi Fruit, work as bacillus amyloliquefaciensBacillus amyloliquefaciensKM 68 bacteria containing amount reaches 2 × 106cfu/mL When, 81.7% is reached to the prevention effect of pakchoi clubroot, continues to improve biological and ecological methods to prevent plant disease, pests, and erosion bacteria concentration, the preventing and treating to pakchoi clubroot Effect improves and unobvious.
Embodiment 6:Liquid fermentation preparation(Prevent and treat the biological agent of crop in cruciferae clubroot)To crop in cruciferae (Stem mustard)The preventing and treating experiment of clubroot
Experimental subjects:Stem mustard
Prepare biological agent:Experiment biological agent is prepared according to the culture growing method of embodiment 4, is contained through plate count measure Bacterium amount, the bacteria containing amount of bacillus amyloliquefaciens reach(1.6~3.2)×108cfu/mL;
By biological agent dilution, 20 times obtain preparation A, and by biological agent dilution, 100 times obtain preparation B, and biological agent is diluted 500 times obtain formulation C;
For medicine preparation and processing:
(1)The soil sun is heat-treated:The soil for soil of deep ploughing is poured water 30min, makes the abundant saturation of the moisture in soil, covering one Layer plastic sheeting is sealed, and is then carried out the sun and is heat-treated 35 days, collection sun heat treatment pedotheque;
(2)Greenhouse production:Hole tray is cultivated using 72 holes, by step(1)The cave that is placed in greenhouse of sun heat treatment pedotheque In disk, 3 ~ 4 crop in cruciferae are sowed in every cave of hole tray(Stem mustard)Vegetable seeds, take step(1)Solar heat at Manage pedotheque covering, watering, crop in cruciferae plant(Stem mustard)For seed sprouting to 3 ~ 4 leaves are grown, it is unnecessary to cut off Seedling, per cave retain one plant of healthy seedling, using the dilution of biological agent to crop in cruciferae plant(Stem mustard) Seedling carries out root irrigation 1 time, and the dilution for the biological agent that each plant root adds is 10mL;
A:The dilution of biological agent is the preparation A of biological 20 times of preparation diluent;
B:The dilution of biological agent is the preparation B of biological 100 times of preparation diluent;
C:The dilution of biological agent is the formulation C of biological 500 times of preparation diluent;
D:Blank control, using clear water to crop in cruciferae plant(Stem mustard)Seedling carries out root irrigation 1 time, each plant The clear water amount that root adds is 10mL;
Test method:In addition to dispenser sets varying level, other field management produce with conventional;Experiment sets 4 processing, 3 weights It is multiple, Gong12Ge areas, survey production is often distinguished during harvest;
Investigation method:State of an illness overground part biological yield is investigated in stem mustard harvest time;
Experimental result
Prevention effect of the table 2. to stem mustard clubroot
The sun is heat-treated soil combination biocontrol microorganisms root irrigation, in liquid fermentation preparation(Prevent and treat crop in cruciferae clubroot Biological agent)Bacillus amyloliquefaciensBacillus amyloliquefaciensKM 68 bacteria containing amount also can when relatively low Good prevention effect is reached to stem mustard clubroot, works as bacillus amyloliquefaciensBacillus amyloliquefaciens KM 68 bacteria containing amount reaches 2 × 106During cfu/mL, 76% is reached to the prevention effect of stem mustard clubroot, continues to improve biological and ecological methods to prevent plant disease, pests, and erosion Bacteria concentration, simultaneously unobvious are improved to the prevention effect of stem mustard clubroot.
Embodiment 7:Liquid fermentation preparation(Prevent and treat the biological agent of crop in cruciferae clubroot)To crop in cruciferae (Cabbage)The preventing and treating experiment of clubroot
Experimental subjects:Cabbage
Prepare biological agent:Experiment biological agent is prepared according to the culture growing method of embodiment 4, is contained through plate count measure Bacterium amount, the bacteria containing amount of bacillus amyloliquefaciens reach(1.6~3.2)×108cfu/mL;
By biological agent dilution, 20 times obtain preparation A, and by biological agent dilution, 100 times obtain preparation B, and biological agent is diluted 500 times obtain formulation C;
For medicine preparation and processing:
(1)The soil sun is heat-treated:The soil for soil of deep ploughing is poured water 30min, makes the abundant saturation of the moisture in soil, covering one Layer plastic sheeting is sealed, and is then carried out the sun and is heat-treated 35 days, collection sun heat treatment pedotheque;
(2)Greenhouse production:Hole tray is cultivated using 72 holes, by step(1)The cave that is placed in greenhouse of sun heat treatment pedotheque In disk, 3 ~ 4 crop in cruciferae are sowed in every cave of hole tray(Cabbage)Vegetable seeds, take step(1)Solar heat Handle pedotheque covering, watering, crop in cruciferae plant(Cabbage)Seed sprouting is cut off to 3 ~ 4 leaves are grown Unnecessary seedling, one plant of healthy seedling is retained per cave, using the dilution of biological agent to crop in cruciferae plant(Stem mustard Dish)Seedling carries out root irrigation 1 time, and the dilution for the biological agent that each plant root adds is 10mL;
A:The dilution of biological agent is the preparation A of biological 20 times of preparation diluent;
B:The dilution of biological agent is the preparation B of biological 100 times of preparation diluent;
C:The dilution of biological agent is the formulation C of biological 500 times of preparation diluent;
D:Blank control, using clear water to crop in cruciferae plant(Cabbage)Seedling carries out root irrigation 1 time, every plant of plant The clear water amount that thing root adds is 10mL;
Test method:In addition to dispenser sets varying level, other field management produce with conventional;Experiment sets 4 processing, 3 weights It is multiple, Gong12Ge areas, survey production is often distinguished during harvest;
Investigation method:State of an illness overground part biological yield is investigated in cabbage harvest time;
Experimental result
Prevention effect of the table 3. to cabbage clubroot
The sun is heat-treated soil combination biocontrol microorganisms root irrigation, in liquid fermentation preparation(Prevent and treat crop in cruciferae clubroot Biological agent)Bacillus amyloliquefaciensBacillus amyloliquefaciensKM 68 bacteria containing amount also can when relatively low Good prevention effect is reached to cabbage clubroot, works as bacillus amyloliquefaciensBacillus amyloliquefaciens KM 68 bacteria containing amount reaches 2 × 106During cfu/mL, 75.36% is reached to the prevention effect of cabbage clubroot, continues to improve Biological and ecological methods to prevent plant disease, pests, and erosion bacteria concentration, simultaneously unobvious are improved to the prevention effect of cabbage clubroot.
To sum up, sun heat treatment combines biocontrol microorganisms bacillus amyloliquefaciens has obvious preventing and treating to make to Cruciferae clubroot With, and the yield of plant can be added, when the concentration of biocontrol microorganisms reaches 2 × 106During cfu/mL, i.e., clubroot can be reached Good prevention effect, therefore sun processing combines bacillus amyloliquefaciensBacillus amyloliquefaciens KM 68 Preventing and treating and volume increase to Cruciferae clubroot have a good application prospect.
<110>Kunming University of Science and Technology
<120>A kind of biological agent for preventing and treating crop in cruciferae clubroot and its application
<130> 1
<160> 1
<170> PatentIn version 3.5
<210> 1
<211> 1427
<212> DNA
<213> Bacillus amyloliquefaciens KM68
<400> 1
tctataatgc aagtcgagcg gacagatggg agcttgctcc ctgatgttag cggcggacgg 60
gtgagtaaca cgtgggtaac ctgcctgtaa gactgggata actccgggaa accggggcta 120
ataccggatg gttgtttgaa ccgcatggtt cagacataaa aggtggcttc ggctaccact 180
tacagatgga cccgcggcgc attagctagt tggtgaggta acggctcacc aaggcaacga 240
tgcgtagccg acctgagagg gtgatcggcc acactgggac tgagacacgg cccagactcc 300
tacgggaggc agcagtaggg aatcttccgc aatggacgaa agtctgacgg agcaacgccg 360
cgtgagtgat gaaggttttc ggatcgtaaa gctctgttgt tagggaagaa caagtgccgt 420
tcaaataggg cggcaccttg acggtaccta accagaaagc cacggctaac tacgtgccag 480
cagccgcggt aatacgtagg tggcaagcgt tgtccggaat tattgggcgt aaagggctcg 540
caggcggttt cttaagtctg atgtgaaagc ccccggctca accggggagg gtcattggaa 600
actggggaac ttgagtgcag aagaggagag tggaattcca cgtgtagcgg tgaaatgcgt 660
agagatgtgg aggaacacca gtggcgaagg cgactctctg gtctgtaact gacgctgagg 720
agcgaaagcg tggggagcga acaggattag ataccctggt agtccacgcc gtaaacgatg 780
agtgctaagt gttagggggt ttccgcccct tagtgctgca gctaacgcat taagcactcc 840
gcctggggag tacggtcgca agactgaaac tcaaaggaat tgacgggggc ccgcacaagc 900
ggtggagcat gtggtttaat tcgaagcaac gcgaagaacc ttaccaggtc ttgacatcct 960
ctgacaatcc tagagatagg acgtcccctt cgggggcaga gtgacaggtg gtgcatggtt 1020
gtcgtcagct cgtgtcgtga gatgttgggt taagtcccgc aacgagcgca acccttgatc 1080
ttagttgcca gcattcagtt gggcactcta aggtgactgc cggtgacaaa ccggaggaag 1140
gtggggatga cgtcaaatca tcatgcccct tatgacctgg gctacacacg tgctacaatg 1200
gacagaacaa agggcagcga aaccgcgagg ttaagccaat cccacaaatc tgttctcagt 1260
tcggatcgca gtctgcaact cgactgcgtg aagctggaat cgctagtaat cgcggatcag 1320
catgccgcgg tgaatacgtt cccgggcctt gtacacaccg cccgtcacac cacgagagtt 1380
tgtaacaccc gaagtcggtg aggtaacctt ttaggagcca gccgcca 1427

Claims (3)

  1. A kind of 1. biological agent for preventing and treating crop in cruciferae clubroot, it is characterised in that:The production bacterial strain of said preparation is Xie Dian Afnyloliquefaciens bacterial strainBacillus amyloliquefaciens KM 68, its guarantor in China typical culture collection center It is CCTCC NO to hide numbering:M 2017228, said preparation are bacillus amyloliquefaciensBacillus amyloliquefaciens The bacterium solution of the bacterial strains of KM 68.
  2. 2. the application process of the biological agent of the preventing and treating crop in cruciferae clubroot described in claim 1, it is characterised in that tool Body step is as follows:
    (1)The soil sun is heat-treated:Deep ploughing soil, pour water, seal, then carry out the sun and be heat-treated more than 30 days;
    (2)Greenhouse production:Acquisition step(1)The pedotheque of gained sun heat treatment is placed in the hole tray in greenhouse, in hole tray The vegetable seeds of middle sowing crop in cruciferae, the pedotheque covering for taking the sun to be heat-treated, watering, the plant of crop in cruciferae Thing seed sprouting cuts off unnecessary seedling to when growing 3 ~ 4 leaves, and one plant of healthy seedling is retained per cave, is made using biology Agent carries out root irrigation 1 time to crop in cruciferae plant seedlings.
  3. 3. the application process of the biological agent of preventing and treating crop in cruciferae clubroot according to claim 2, its feature exist In:Biological agent is bacillus amyloliquefaciensBacillus amyloliquefaciens The bacterium solution of the bacterial strains of KM 68, bacterium solution Gemma amount is 4 × 105~ 1×107cfu/mL。
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CN102757917A (en) * 2011-12-28 2012-10-31 浙江大学 Biocontrol agent for preventing and curing bacterial wilt and club roots of plant as well as preparation method and application thereof
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Publication number Priority date Publication date Assignee Title
CN109699234A (en) * 2018-08-30 2019-05-03 四川省农业科学院植物保护研究所 A kind of seed-coating method and capsuled seed preventing rapeseed clubroot

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